Changeling

Two stories by the Hugo and Nebula Award winning author Roger Zelazny following the development of an evil wizard's baby taken to earth unaware of his dark magic past. He returns to his home land and is a powerful sorcerer, but he has many enemies and one want him dead...In 'Changling', the people had long suffered under Det Morson's power...lived in terror of his dragons and other minions. When at last, the wizard Mor joined the fight, Det and his infamous Rondoval castle were destroyed. But the victory was not complete, for the conquerors found a baby amidst the rubble: Det's son, Pol. Unwilling to kill the child, Mor took him to a world where the ways of magic were considered mere legends - a world called Earth. Years later, the boy grew to become Daniel Chain, a nightclub guitarist possessing mental energies he doesn't understand. But those mental abilities will soon determine his fate in a terrifying clash of power...on a world which, as yet, he knows nothing about. In 'Madwand' Pol Detson, son of Lord Det of Rondovel, has come home. He is now a powerful sorceror of unsurpassed natural ability - in a world where the power of magic is the only kind that matters. But Pol is still an untrained talent, a 'madwand'. To take control of his powers, to rule in his father's place, he must survive arduous training and a fantastic initiation into the rites of sorcery. As friends, Pol has one dragon and one thief. As enemies, he has the most powerful wizards of the land. And at least one of them wants him dead.